Carb source at dinner....

Often I'm on the middle of the dinner and I realize that I have still 30-50g of Carb left.
Say I need/planned 200g and I realize I'm at 160g.
I don't want to untroduce an High glicemix index carb at 8 PM, so I'm searching a medium -low Glic index carb to add at the end of my dinner.
I HAVE TO AVOID fruit, and oats ( and obviously pasta , rice, and bread and potetos).
Any suggestion?

I can't because if I use Fruit at Dinner or lunch I have problems...
Just to be sure to have a good amount of fruit I usually consume fruit away from big meal (I consume usually at breakfast, and in the 10AM and 4 PM snack.

Perhaps a sweet potatoe or blue sweet potatoes. Even ancient grains like kamut and quinoa would be good sources of low glycemic carbs. You could also try beans. Garbanzo beans are higher in carbs than red or black beans

I can't because if I use Fruit at Dinner or lunch I have problems...
Just to be sure to have a good amount of fruit I usually consume fruit away from big meal (I consume usually at breakfast, and in the 10AM and 4 PM snack.